New Insights on Biodiversity and Conservation of Amphidromous Shrimps of the Indo-Pacific islands (Decapoda: Atyidae: <i>Caridina</i>)

Amphidromous shrimps of the genus Caridina (Crustacea: Decapoda: Atyidae) are essential components of the tropical insular freshwater ecosystems. Due to an extremely confused taxonomy, their biodiversity is poorly known and their conservation status cannot be properly assessed. However, thanks to recent advances in integrative taxonomy, the systematics of this genus progressively becomes clearer, allowing us to draw conclusions about their biogeography and conservation biology. In this chapter, we (1) review the current state of knowledge of amphidromous Caridina diversity in the light of the latest results of integrative taxonomy, (2) review the threats faced by Caridina in Indo-Pacific Islands, and (3) discuss how integrative taxonomic approaches can inform and support programs designed to limit the impacts of threatening processes on the diversity of Caridina. Finally, we provide recommendations for the conservation of these species and their habitats.